diff -Naudr dovecot-0.99.14/src/lib-storage/index/maildir/maildir-storage.c dovecot-0.99.14-colons/src/lib-storage/index/maildir/maildir-storage.c
--- dovecot-0.99.14/src/lib-storage/index/maildir/maildir-storage.c	Thu Jun 17 20:50:09 2004
+++ dovecot-0.99.14-colons/src/lib-storage/index/maildir/maildir-storage.c	Thu Sep 15 19:08:26 2005
@@ -32,8 +32,9 @@
 {
 	struct mail_storage *storage;
 	const char *home, *path, *root_dir, *index_dir, *control_dir, *p;
+	const char *q1, *q2;
 
-	root_dir = index_dir = control_dir = NULL;
+	root_dir = index_dir = control_dir = p = NULL;
 
 	if (data == NULL || *data == '\0') {
 		/* we'll need to figure out the maildir location ourself.
@@ -51,10 +52,17 @@
 		}
 	} else {
 		/* <Maildir> [:INDEX=<dir>] [:CONTROL=<dir>] */
-		p = strchr(data, ':');
-		if (p == NULL)
+		q1 = strchr(data, ':');
+		q2 = strchr(data, '=');
+		if (q1 == NULL || q2 == NULL)
 			root_dir = data;
 		else {
+			do {
+				p = q1;
+				q1 = strchr(p, ':');
+				q2 = strchr(p, '=');
+			} while (q1 && (!q2 || q1 < q2));
+
 			root_dir = t_strdup_until(data, p);
 
 			do {
@@ -106,8 +114,21 @@
 static int maildir_autodetect(const char *data)
 {
 	struct stat st;
+	const char *p, *q1, *q2;
 
-	data = t_strcut(data, ':');
+	p = NULL;
+
+	q1 = strchr(data, ':');
+	q2 = strchr(data, '=');
+	if (q1 && q2) {
+		do {
+			p = q1;
+			q1 = strchr(p, ':');
+			q2 = strchr(p, '=');
+		} while (q1 && (!q2 || q1 < q2));
+	}
+	if (p != NULL)
+		data = t_strdup_until(data, p);
 
 	return stat(t_strconcat(data, "/cur", NULL), &st) == 0 &&
 		S_ISDIR(st.st_mode);